Using film's dynamic range from scans
Good BW film like TMax100 has about 15 stops of usable dynamic range. My V700 scanner has a reported Dmax of 4.2, which is fourteen stops. Possibly this could be extended by multi pass scanning as is offered in recent updates of Silverfast.
In the traditional darkroom, this extended dynamic range could be accessed by "burning" part of the print, allowing the brightest parts of the image (densest parts of the negative) to gradually lower their values to the desired range. For example, Zone 10 on the negative would be lowered to Zone 7 on the print. This was a common method especially for landscapes, where this darkroom method was used to balance exposure in land and sky, instead of the ND grads that were used with transparency film.
I would like to understand better how to capture this extended dynamic range during the scanning process, in some sort of HDR file for example, and then access it with some technique similar to "burning" (reducing exposure) via software like Aperture.
Let me know how you fellows do this sort of thing.